DYNAMICS OF LIBRATIONAL MOTION AND PHASE TRANSITIONS IN N//2-TYPE CRYSTALS.

T. N. Antsygina, V. A. Slusarev, Yu A. Freiman, A. I. Erenburg

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The dynamics of librational motion in N-type crystals ( alpha -N//2, alpha -CO, N//2O, CO//2) is treated by taking into account both anharmonic and correlation effects. The method used is similar to the Tyablikov's method in the theory of magnetism. The main thermodynamic characteristics of the librational subsystem are calculated: the order parameter, rms librational angle, librational mode frequencies and corresponding Grueneisen parameters, librational heat capacity, internal and free energies. The librational isotope effects for alpha - **1**4N//2 and alpha - **1**5N//2 is considered. An explanation of the anomaly isotope effects in heat capacity is proposed. A theory of the phase transition into orientationally disordered state is developed.

Original languageEnglish
Title of host publicationUnknown Host Publication Title
PublisherNorth-Holland
Pages677-678
Number of pages2
Editionpt 1
ISBN (Print)0444869107
StatePublished - 1 Dec 1984
Externally publishedYes

Publication series

Name
Numberpt 1

ASJC Scopus subject areas

  • General Engineering

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